The journal
Open the journal →The conversation starts in the journal — be the first to post.
About Mary O'Brien, 3rd Countess of Orkney
Mary O'Brien, 3rd Countess of Orkney was the eldest daughter of Anne O'Brien, 2nd Countess of Orkney, and William O'Brien, 4th Earl of Inchiquin, and Countess of Orkney in her own right.
Everything about Mary O'Brien, 3rd Countess of Orkney →- Occupation
- politician
- Born
- 1721
- Died
- May 10, 1791